5-Nitrobenzo[c][1,2,5]oxadiazole CAS 18772-11-7
| CAS No. | 18772-11-7 |
| Molecular Formula | C6H3N3O3 |
| Molecular Weight | 165.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 5-Nitrobenzo[c][1,2,5]oxadiazole (C6H3N3O3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 165.11 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
CATO supplies 5-Nitrobenzo[c][1,2,5]oxadiazole (CAS 18772-11-7), a certified reference material (molecular formula C6H3N3O3, MW 165.11 g/mol) for analytical method development and quality control.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C6H3N3O3 |
| Molecular Weight | 165.11 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 3 |
Related Nitrobenzo Standards
- 4-Nitrobenzo[c][1,2,5]oxadiazole (CAS 16322-19-3)
- 7-Nitrobenzo[d]oxazole (CAS 125533-84-8)
- 6-Nitrobenzo[c]isoxazole (CAS 15264-44-5)
- 4-Nitrobenzo[d]isoxazole (CAS 1823353-28-1)
- 4-Nitrobenzo[c]isoxazole (CAS 188860-13-1)
- 6-Nitrobenzo[d]isoxazole (CAS 39835-08-0)
- 4-Nitrobenzo[d][1,3]dioxole (CAS 72744-45-7)
- 5-Nitrobenzo[d][1,3]dioxole (CAS 2620-44-2)
Recommended Standards
- 4-hydroxy-5-nitronicotinonitrile (CAS 1806281-60-6)
- Pyrimido[5,4-e][1,2,4]triazine-5,7(6H,8H)-dione (CAS 19359-69-4)
- 3-Hydroxy-5-nitropicolinonitrile (CAS 1806281-53-7)
- (5-(Trifluoromethyl)furan-2-yl)methanamine (CAS 868755-68-4)
- Imetit dihydrobromide, 95% (CAS 102203-18-9)
- 1-(6-Iodo-4-methylpyridin-3-yl)ethan-1-ol (CAS 1355200-66-6)
- 2-(4-Chlorophenyl)-4-methylthiazole (CAS 25100-91-8)
- 4-Cyano-2-methylpyridine (CAS 2214-53-1)
- 1-[2-(4-methylpiperidin-1-yl)-2-(thiophen-2-yl)ethyl]-3-[(5-sulfamoylthiophen-2-yl)methyl]urea (CAS 941384-56-1)
- 3-(5-Chloro-2-methoxybenzyl)piperidine (CAS 1216204-07-7)
- Cyclopentyl(5-methylfuran-2-yl)methanamine (CAS 473732-73-9)
- Ritonavir-D10 (CAS 155213-67-5 (unlabeled))
- 3-(1,4-Diazepan-1-yl)propanenitrile (CAS 1094633-63-2)
- Acetyl Tripeptide-1 (CAS 350595-76-5)
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